抽象學習,星期的定義

 

using System;
using System.Text;
using System.Collections.Generic;

/**//// <summary>
/// 抽象學習
/// </summary>
public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        NameConverter myNameConverter = new NameConverter();
        myNameConverter.AddInnerNameConverters(
            new ChineseFullNameConverter(),
            new ChineseShortNameConverter(),
            new EnglishFullNameConverter(),
            new EnglishShortNameConverter()
            );
        Response.Write(myNameConverter.ToString(Day.Friday));
    }
}

public abstract class NameConverterBase
{
    public abstract string ToString(Day day);
}

public class ChineseFullNameConverter : NameConverterBase
{
    public override string ToString(Day day)
    {
        switch(day)
        {
            case Day.Sunday:
                return "星期日";
            case Day.Monday:
                return "星期一";
            case Day.Tuesday:
                return "星期二";
            case Day.Wednesday:
                return "星期三";
            case Day.Thursday:
                return "星期四";
            case Day.Friday:
                return "星期五";
            case Day.Saturday:
                return "星期六";
            default:
                throw new ArgumentOutOfRangeException("day", "Value not supported!");
        }
    }
}

public class ChineseShortNameConverter : NameConverterBase
{
    public override string ToString(Day day)
    {
        switch (day)
        {
            case Day.Sunday:
                return "日";
            case Day.Monday:
                return "一";
            case Day.Tuesday:
                return "二";
            case Day.Wednesday:
                return "三";
            case Day.Thursday:
                return "四";
            case Day.Friday:
                return "五";
            case Day.Saturday:
                return "六";
            default:
                throw new ArgumentOutOfRangeException("day", "Value not supported!");
        }
    }
}

public class EnglishFullNameConverter : NameConverterBase
{
    public override string ToString(Day day)
    {
        return day.ToString();
    }
}

public class EnglishShortNameConverter : NameConverterBase
{
    public override string ToString(Day day)
    {
        return day.ToString().Substring(0, 3);
    }
}

public enum Day 
{
    Sunday,
    Monday,
    Tuesday,
    Wednesday,
    Thursday,
    Friday,
    Saturday,
}

public class NameConverter
{
    private StringBuilder m_content = new StringBuilder();

    private List<NameConverterBase> m_nameConverter = new List<NameConverterBase>();

    /**//// <summary>
    /// 添加一個NameConverter
    /// </summary>
    /// <param name="innerNameConverter"></param>
    public void AddInnerNameConverter(NameConverterBase innerNameConverter)
    {
        if (m_nameConverter.Contains(innerNameConverter))
            return;
        m_nameConverter.Add(innerNameConverter);
    }

    /**//// <summary>
    /// 添加一堆NameConverters
    /// </summary>
    /// <param name="innerNameConverters"></param>
    public void AddInnerNameConverters(params NameConverterBase[] innerNameConverters)
    {
        foreach (NameConverterBase innerNameConverter in innerNameConverters)
        {
            AddInnerNameConverter(innerNameConverter);
        }
    }

    public string ToString(Day day)
    {
        foreach (NameConverterBase innerNameConverter in m_nameConverter)
        {
            m_content.AppendFormat("{0} ", innerNameConverter.ToString(day));
        }
        return m_content.ToString().TrimEnd();
    }
}